Analog Devices Inc./Maxim Integrated MAX6458UKD0C+T

Overview

MAX6458UKD0C+T from Analog Devices is a dual-threshold, window voltage monitor IC designed for high-voltage power-rail supervision in automotive and industrial systems. It features two precision comparators (undervoltage and overvoltage), 8.3% internal hysteresis, 50μs timeout, open-drain output, and operates from 4V to 28V supply with 3.5μA typical quiescent current. It is used in multicell Li+ battery-stack protection circuits to assert fault when input falls below or exceeds adjustable thresholds.

For engineers reviewing the MAX6458UKD0C+T datasheet, MAX6458UKD0C+T pinout, MAX6458UKD0C+T application, or MAX6458UKD0C+T equivalent, key selection criteria include its fixed 50μs response time, factory-trimmed 8.3% hysteresis, SOT23-5 package compatibility, and ability to implement window detection without external hysteresis components.

Technical Context

The MAX6458UKD0C+T integrates two independent comparators sharing a single open-drain output: one monitors IN+ against VTH− (undervoltage), the other monitors IN− against VTH+ (overvoltage). Its internal 2.25V ±2.5% reference enables precise threshold setting via external resistor dividers. The device asserts OUT low when either condition is violated - no latching logic is present, distinguishing it from the MAX6457 series.

It uses BiCMOS process technology, supports input common-mode range up to 1.4V, and maintains functional stability across −40°C to +125°C. Unlike the MAX6459, it provides only one output signal indicating "out-of-window" status, simplifying interface but requiring external logic if separate UV/OV flags are needed.

Key Specifications

Pinout & Package

MAX6458UKD0C+T is housed in a lead(Pb)-free, RoHS-compliant 5-pin SOT23 package (package code U5+1, outline 21-0057), with thermal resistance θJA = 255.9°C/W on multilayer board.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar window voltage monitor applications.

Compared with MAX6458UKD0B+T, the MAX6458UKD0C+T offers greater noise margin due to its wider hysteresis, while TLV809ECDR lacks both window functionality and high-voltage capability - making MAX6458UKD0C+T uniquely suited for 4–28V adjustable window supervision in harsh environments.

Availability

MAX6458UKD0C+T is available at Aetrix Electronics and suitable for automotive battery management, industrial power supplies, and telecom infrastructure requiring stable component supply with full AEC-Q100-aligned qualification evidence.

Supply support for MAX6458UKD0C+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and automotive safety markets.

The MAX6457–MAX6460 family was engineered specifically for high-voltage, ultra-low-power supply monitoring in space-constrained, thermally demanding applications such as battery-powered portable equipment and under-hood automotive electronics.

FAQ

What is the function of the IN+ and IN− pins on the MAX6458UKD0C+T?

The IN+ pin serves as the noninverting input for the undervoltage comparator, while IN− serves as the inverting input for the overvoltage comparator. Together they enable window detection: OUT goes low when IN+ falls below VTH− (undervoltage) OR IN− rises above VTH+ (overvoltage). Both pins accept voltages from 0V to VCC and interface with external resistor dividers to set custom thresholds. This dual-input architecture is fundamental to the MAX6458UKD0C+T's role as a programmable window monitor.

Does the MAX6458UKD0C+T support latched output behavior like the MAX6457?

No, the MAX6458UKD0C+T does not include a CLEAR input or latch functionality. Unlike the MAX6457UKDxx-T series, it operates in transparent mode only: OUT returns high immediately after the monitored voltage re-enters the window, provided the 50μs timeout has elapsed. The absence of latching simplifies design for applications requiring continuous real-time window status, such as dynamic power-rail supervision in telecom equipment where persistent fault flags would impede recovery.

Can the MAX6458UKD0C+T monitor negative voltages?

No, the MAX6458UKD0C+T cannot directly monitor negative voltages because its IN+ and IN− inputs are specified for 0V to VCC range only. However, the related MAX6460 variant supports negative voltage monitoring via REF and input configuration. For negative rail supervision, designers should select MAX6460UT-T with appropriate resistor network per Figure 14 in the datasheet - the MAX6458UKD0C+T is strictly intended for positive-supply window detection.

What is the significance of the '0C' suffix in MAX6458UKD0C+T?

Within the MAX6458UKDxx-T naming convention, '0C' indicates two factory-set attributes: '0' specifies the 50μs timeout period (as opposed to '3' for 150ms), and 'C' selects the 8.3% internal hysteresis option. This combination is optimized for fast-response, noise-immune window detection in electrically noisy environments such as automotive power distribution units. The '0C' suffix ensures consistent performance without requiring external hysteresis components or timing capacitors.

Is the MAX6458UKD0C+T AEC-Q100 qualified?

The MAX6458UKD0C+T is not explicitly listed as AEC-Q100 qualified in the official documentation; only the MAX6459UTA/V+ and MAX6459UTA/V-T variants carry the /V automotive qualification suffix and AEC-Q100 certification. However, the MAX6458UKD0C+T shares the same −40°C to +125°C operating temperature range, BiCMOS process, and stress-tested construction as qualified parts, making it widely deployed in automotive subsystems where full AEC-Q100 documentation is not mandated - but formal qualification requires verification of the specific /V-part number.